修改文件结构。

POP/14/Exercise01.c

@@ -0,0 +1,88 @@
+#include <stdio.h>
+#include <stdbool.h>
+#define MALE false
+#define FEMALE true
+
+typedef struct {
+    int year;
+    int month;
+    int date;
+} DATE;
+
+typedef struct {
+    int ID;
+    char name[21];
+    bool sex;
+    DATE birthday;
+    double score;
+} STUDENT;
+
+void saveStu(STUDENT students[], int count) {
+    int i;
+    FILE* fileObj;
+    for (i = 0; i < count; i++) {
+        printf("ID: ");
+        scanf("%d", &students[i].ID);
+        printf("Name(max 20 char): ");
+        scanf("%20s", students[i].name);
+        printf("Sex: (MALE-0/FEMLE-1)");
+        scanf("%d", &students[i].sex);
+        printf("Birthday (Year/Month/Date):");
+        scanf("%d/%d/%d", &students[i].birthday.year, &students[i].birthday.month, &students[i].birthday.date);
+        printf("Scores:\n");
+        scanf("%lf", &students[i].score);   
+    }
+    fileObj = fopen("studentInfos", "wb");
+    if (fileObj == NULL) {
+        printf("Cannot open file.\n");
+        return;
+    }
+    if (fwrite(students, sizeof(STUDENT), count, fileObj) == 0) {
+        printf("Print file error.\n");
+    }
+    fclose(fileObj);
+}
+
+void loadStu(STUDENT students[], int count) {
+    int i;
+    FILE* fileObj;
+    int targetID;
+    fileObj = fopen("studentInfos", "rb");
+    if (fileObj == NULL) {
+        printf("Cannot open file.\n");
+        return;
+    }
+    if (fread(students, sizeof(STUDENT), count, fileObj) == 0) {
+        printf("Read error.\n");
+        return;
+    }
+    fclose(fileObj);
+    printf("Loaded.\n");
+    printf("ID to be checked: ");
+    scanf("%d", &targetID);
+    for (i = 0; i < count; i++) {
+        if (targetID == students[i].ID) {
+            printf("ID:%d; Name: %s; Sex:%s; Birthday:%d/%d/%d; Score:%lf\n", students[i].ID, students[i].name, students[i].sex?"FEMALE":"MALE", students[i].birthday.year, students[i].birthday.month, students[i].birthday.date, students[i].score);
+            return;
+        }
+        
+    }
+}
+
+int main() {
+    STUDENT students[10];
+    int i = 0;
+    int count = 3;
+    char mode;
+    // freopen("fakedata","r",stdin);
+    printf("Select: (S)ave/(L)oad ");
+    scanf("%c", &mode);
+    if (mode == 's' || mode == 'S') {
+        saveStu(students, count);
+    }
+    else if (mode == 'l' || mode == 'L') {
+        loadStu(students, count);
+    }
+    
+    return 0;
+}